Add a type to represent the NDP Recursive DNS Server option

This change adds a type to represent the NDP Recursive DNS Server option, as
defined by RFC 8106 section 5.1.

PiperOrigin-RevId: 284005493

2 files changed, 6 insertions, 6 deletions

diff --git a/pkg/tcpip/stack/ndp.go b/pkg/tcpip/stack/ndp.go
index cfdd0496e..1d202deb5 100644
--- a/pkg/tcpip/stack/ndp.go
+++ b/pkg/tcpip/stack/ndp.go
@@ -596,7 +596,7 @@ func (ndp *ndpState) handleRA(ip tcpip.Address, ra header.NDPRouterAdvert) {
 			// Update the invalidation timer.
 			timer := prefixState.invalidationTimer
 
-			if timer == nil && vl >= header.NDPPrefixInformationInfiniteLifetime {
+			if timer == nil && vl >= header.NDPInfiniteLifetime {
 				// Had infinite valid lifetime before and
 				// continues to have an invalid lifetime. Do
 				// nothing further.
@@ -615,7 +615,7 @@ func (ndp *ndpState) handleRA(ip tcpip.Address, ra header.NDPRouterAdvert) {
 				*prefixState.doNotInvalidate = true
 			}
 
-			if vl >= header.NDPPrefixInformationInfiniteLifetime {
+			if vl >= header.NDPInfiniteLifetime {
 				// Prefix is now valid forever so we don't need
 				// an invalidation timer.
 				prefixState.invalidationTimer = nil
@@ -734,7 +734,7 @@ func (ndp *ndpState) rememberOnLinkPrefix(prefix tcpip.Subnet, l time.Duration)
 	var timer *time.Timer
 
 	// Only create a timer if the lifetime is not infinite.
-	if l < header.NDPPrefixInformationInfiniteLifetime {
+	if l < header.NDPInfiniteLifetime {
 		timer = ndp.prefixInvalidationCallback(prefix, l, &doNotInvalidate)
 	}
 
diff --git a/pkg/tcpip/stack/ndp_test.go b/pkg/tcpip/stack/ndp_test.go
index 5b901f947..b2af78212 100644
--- a/pkg/tcpip/stack/ndp_test.go
+++ b/pkg/tcpip/stack/ndp_test.go
@@ -1364,10 +1364,10 @@ func TestPrefixDiscoveryWithInfiniteLifetime(t *testing.T) {
 	// invalidate the prefix.
 	const testInfiniteLifetimeSeconds = 2
 	const testInfiniteLifetime = testInfiniteLifetimeSeconds * time.Second
-	saved := header.NDPPrefixInformationInfiniteLifetime
-	header.NDPPrefixInformationInfiniteLifetime = testInfiniteLifetime
+	saved := header.NDPInfiniteLifetime
+	header.NDPInfiniteLifetime = testInfiniteLifetime
 	defer func() {
-		header.NDPPrefixInformationInfiniteLifetime = saved
+		header.NDPInfiniteLifetime = saved
 	}()
 
 	prefix := tcpip.AddressWithPrefix{